Troubleshoot General Network Issues

Question 1

What might you want to investigate if you can reach a web server by using its
IP address but not its name?
a. NTP
b. DHCP
c. DNS
d. ARP

Answer 1

Answer: c. This problem sounds like it could be related to DNS-based name
resolution.

Question 2

What device would most likely be unreachable if your default gateway IP
address is misconfigured on the client?
a. A remote web server
b. A local printer
c. Your neighbor’s laptop
d. Your loopback

Answer 2

Answer: a. A misconfigured default gateway address can lead to issues with
reaching remote destinations.

Question 3

In the absence of STP, what issues might result from a Layer 2 loop in a
network? (Choose two.)
a. A router interface’s MTU decrementing
b. MAC address table corruption
c. Broadcast storms
d. Packet fragmentation

Answer 3

Answer: b, c. STP protects against three main issues: MAC address table corruption, broadcast storms, and loops at Layer 2.

Question 4

If you successfully ping from host A to host B, what can you conclude about
host A?
a. OSI Layers 1–4 are functional.
b. OSI Layers 1–3 are functional.
c. OSI Layers 1–7 are functional.
d. You must have a fully functional default gateway.

Answer 4

Answer: b. Being able to successfully ping another host is a simple method of
confirming that Layers 1 through 3 of the OSI model are working.

Question 5

What configuration on a Layer 2 switch is used to define broadcast domains
where they would not exist naturally on their own?
a. ARP
b. STP
c. VTP
d. VLAN

Answer 5

Answer: d. The configuration of VLANs permits the creation of additional
broadcast domains.

Question 6

To what subnet does a host with the IP address 172.16.155.10/18 belong?
a. 172.16.0.0 /18
b. 172.16.96.0 /18
c. 172.16.128.0 /18
d. 172.16.154.0 /18

Answer 6

Answer: c. This IP address and subnet mask combination means that this host
lives on the 172.16.128.0 subnet.